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Quantum Channel State Masking

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arxiv 2006.05925 v4 pith:SXA3WWH6 submitted 2020-06-10 cs.IT math.ITquant-ph

Quantum Channel State Masking

classification cs.IT math.ITquant-ph
keywords channelquantumstateassistanceinformationmaskingwithoutbounds
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Communication over a quantum channel that depends on a quantum state is considered when the encoder has channel side information (CSI) and is required to mask information on the quantum channel state from the decoder. A full characterization is established for the entanglement-assisted masking equivocation region, and a regularized formula is given for the quantum capacity-leakage function without assistance. For Hadamard channels without assistance, we derive single-letter inner and outer bounds, which coincide in the standard case of a channel that does not depend on a state.

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